8.8

CVE-2023-39975: mit kerberos_5 Double Free

CVSS: 8.8v3.1HighModified
AliasesopenSUSE-SU-2024:13527-1
Published 16-08-2023Last modified 25-02-2026
Open JSON

Vulnerability summary

CVE-2023-39975 is a high (CVSS 8.8) Double Free vulnerability in mit kerberos_5. EPSS estimates a 1.47% chance of exploitation in the next 30 days, higher than 73.3% of scored vulnerabilities.

Overall risk
35/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.8/10
010
High · v3.1 (CVE.org)
EPSS score
1.47%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 1
RHSA-2023:6699

Timeline

  1. 16-08-2023
    PublishedVulnerability first disclosed.
  2. 25-02-2026
    Last modifiedVulnerability information updated.

Description

kdc/do_tgs_req.c in MIT Kerberos 5 (aka krb5) 1.21 before 1.21.2 has a double free that is reachable if an authenticated user can trigger an authorization-data handling failure. Incorrect data is copied from one ticket to another.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

1.47%

Chance of exploitation in the next 30 days

Percentile

73%

Versus all other CVEs

30-day change

0.00 pp

From 1.47% on 20-09-2026

20-09-202620-10-2026
EPSS score
1.47%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Mit1 product
Opensuse1 product
  • krb5&distro=openSUSE Tumbleweed< 1.21.2-1.1

2 vendors · 2 products

References

7 links